/* General styling */
body {
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background: #ffffff;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1 {
  text-align: center;
}

/* Form styling */
.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
}

input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
}

fieldset {
  border: 1px solid #ccc;
  padding: 10px 15px;
  margin-bottom: 15px;
}

legend {
  font-weight: bold;
}

.sub-group {
  margin-bottom: 10px;
}

/* Button styling */
button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #007bff;
  color: #fff;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}

/* Results area styling */
#results {
  margin-top: 20px;
  padding: 15px;
  background: #e9ecef;
  border-radius: 5px;
}